var appid = '20190117000257510';
var key = '1cqiZWeC_DQ2DUoyV2CY';
var salt = (new Date).getTime();
var query = 'apple';
// 多个query可以用\n连接  如 query='apple\norange\nbanana\npear'
var from = 'zh';
var to = 'cn';
var str1 = appid + query + salt + key;